Do these programs overlap in function, and if so, how? Threatfire Mamutu DefenseWall Prevx DriveSentry Comodo Defense+ I just ran out on my Mamutu trial and read here I missed the $9 introductory offer deal. Anyway, I am back to trying out programs now. I'm not looking for an AV, just HIPS and a behavior blocker. I thought Mamutu was both, but perhaps I was wrong on this? (Not sure.) Anyway, any comments comparing the relative and comparative features of the programs would be helpful.